My husband was raised a Mormon. Any suggestions for how I can help him to see the importance of a Sacramental marriage? I would like to have our marriage convalidated and return to the Eucharist, but he doesn’t see the need.
You could talk to your priest regarding radical sanation.
Since your husband is an unbaptized non-Christian, you will not have a sacramental marriage until he decides to be baptized a Christian. It can be made valid and natural by convalidation, but that is a different matter.